Somebody Else's Problem field

The Somebody Else's Problem field, or SEP field, is a device from The Hitchhiker's Guide to the Galaxy that cloaks someone or something by making everyone view whoever or whatever is cloaked as somebody else's problem. They duly ignore the SEP field. Thus, for example, you can make whole mountains disappear, simply by painting them pink and erecting a small SEP field generator.

A SEP field does not protect agents from being affected by events in the continuum. For example, it would stop Haldir from seeing PPC agents and shooting them; but it would not protect the same agents from being hit by a stray arrow during a battle, being drenched during a rainstorm, or being buried inside a collapsing building during an earthquake.